Activity for the week of 4 August-10 August 2010
The Weekly Volcanic Activity Report is a cooperative project between the Smithsonian's Global Volcanism Program and the US Geological Survey's Volcano Hazards Program. Updated by 2300 UTC every Wednesday, notices of volcanic activity posted on these pages are preliminary and subject to change as events are studied in more detail. This is not a comprehensive list of all of Earth's volcanoes erupting during the week, but rather a summary of activity at volcanoes that meet criteria discussed in detail in the "Criteria and Disclaimers" section. Carefully reviewed, detailed reports on various volcanoes are published monthly in the Bulletin of the Global Volcanism Network.
New Activity / Unrest
| Siau Island (Indonesia)
| 2.781°N, 125.407°E
| Elevation 1797 m
According to news articles, an eruption from Karangetang on 6 August produced pyroclastic flows on the W flank that destroyed at least seven houses. A hot ash plume rose above the crater, and incandescent material was ejected from the crater and descended multiple flanks. At least four people were missing, five were injured, and about 65 were evacuated. An article also stated that CVGHM raised the Alert Level to 3 (on a scale of 1-4). According to reports from CVGHM and analyses of satellite imagery, the Darwin VAAC reported that an ash plume rose to an altitude of 9.1 km (30,000 ft) a.s.l. and drifted W.
Sources: Darwin Volcanic Ash Advisory Centre (VAAC), CNN, Associated Press
| Hawaiian Islands (USA)
| 19.421°N, 155.287°W
| Elevation 1222 m
During 4-10 August HVO reported that activity at Kilauea continued from the summit caldera and the east rift zone. At the summit caldera, the level of a lava-pool surface in the deep pit within the floor of Halema'uma'u crater remained mostly stable; glow from the vent was also visible at night. A plume from the vent mainly drifted SW, dropping small amounts of ash downwind.
At the east rift zone, lava flows that broke out of the TEB lava-tube system fed surface flows on the coastal plain, an inflating surface flow in Kalapana, and two ocean entries. The delta built by the W ocean entry named Puhi-o-Kalaikini was 900 m wide by 8 August. The less vigorous E entry, 'Ili'ili, remained active until 9 August. At Pu'u 'O'o crater, incandescence from small areas on the N crater floor was visible. During 9-10 August minor spattering from the area built a very small cone.
Source: US Geological Survey Hawaiian Volcano Observatory (HVO)
| Kyushu (Japan)
| 31.593°N, 130.657°E
| Elevation 1117 m
Based on information from JMA, the Tokyo VAAC reported that explosions from Sakura-jima during 4-9 August produced plumes that rose to altitudes of 1.2-2.4 km (4,000-8,000 ft) a.s.l. and drifted W, NW, and N. Pilots observed ash plumes that rose to altitudes of 2.1-3 km (7,000-10,000 ft) a.s.l. on 7, 9, and 10 August.
Source: Tokyo Volcanic Ash Advisory Center (VAAC)
| Komba Island (Indonesia)
| 7.791°S, 123.585°E
| Elevation 633 m
Based on analyses of satellite imagery, the Darwin VAAC reported that during 9-10 August ash plumes from Batu Tara drifted NW and SW at an altitude of 1.5 km (5,000 ft) a.s.l.
Source: Darwin Volcanic Ash Advisory Centre (VAAC)
| Eastern Kamchatka (Russia)
| 54.049°N, 159.443°E
| Elevation 1513 m
KVERT reported that during 30 July-6 August seismic activity from Karymsky was above background levels and suggested that possible ash plumes rose to an altitude of 2 km (6,700 ft) a.s.l. A thermal anomaly over the volcano was detected in satellite imagery during 29-30 July and 1-2 and 4 August. Imagery also showed ash plumes that drifted 17 km NE on 2 and 3 August. The Aviation Color Code level remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
| Central Kamchatka (Russia)
| 56.056°N, 160.642°E
| Elevation 4754 m
KVERT reported that 30 July-6 August seismic activity from Kliuchevskoi was above background levels and lava flowed down the SSE flank. Strombolian activity and gas-and-ash emissions were observed during 29-30 July and 4-5 August. Cloud cover prevented observations the other days. Satellite imagery analysis showed a large daily thermal anomaly from the volcano and a gas-and-ash plume that drifted 65 km NW on 30 July. The Aviation Color Code level remained at Orange.
Source: Kamchatkan Volcanic Eruption Response Team (KVERT)
| 14.757°N, 91.552°W
| Elevation 3745 m
On 5 August, INSIVUMEH reported that lahars descended Santa María's Nima I, Nima II, and San Isidro rivers, carrying tree branches as well as blocks up to 2 m in diameter. The next day, steam plumes rose above Caliente dome and drifted SW.
Source: Instituto Nacional de Sismologia, Vulcanologia, Meteorologia, e Hidrologia (INSIVUMEH)
| Central Kamchatka (Russia)
| 56.653°N, 161.36°E
| Elevation 3283 m
KVERT reported that during 30 July-6 August seismic activity from Shiveluch was above background levels and suggested that possible ash plumes rose to an altitude of 4.5 km (14,800 ft) a.s.l. Gas-and-steam plumes were seen rising to an altitude of 4 km (13,100 ft) a.s.l. during 29-31 July. Cloud cover prevented observations the other days. Satellite imagery analysis showed a large daily thermal anomaly on the volcano. Based on analysis of satellite imagery, the Tokyo VAAC reported that an eruption on 9 August produced a plume that rose to an altitude of 6.7 km (22,000 ft) a.s.l. The Aviation Color Code level remained at Orange.
Sources: Kamchatkan Volcanic Eruption Response Team (KVERT), Tokyo Volcanic Ash Advisory Center (VAAC)
| 16.72°N, 62.18°W
| Elevation 915 m
Based on a METAR weather report and analyses of satellite imagery, the Washington VAAC reported that on 10 August a narrow plume from Soufrière Hills drifted more than 100 km WNW.
Source: Washington Volcanic Ash Advisory Center (VAAC)
Weekly Reports Archive
||Huila, Nevado del
||Hunga Tonga-Hunga Ha'apai
||Soufriere St. Vincent
||South Sarigan Seamount
||Tair, Jebel at
|Campi Flegrei del Mar di Sicilia
|Chillan, Nevados de
||Palena Volcanic Group
||Kick 'em Jenny
|Dieng Volcanic Complex
||Rincon de la Vieja
|Etorofu-Yakeyama [Grozny Group]
||Lengai, Ol Doinyo
||Ruiz, Nevado del
|Fournaise, Piton de la
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Criteria & Disclaimers
The Weekly Volcanic Activity Report does not necessarily include all volcanic activity that occurred on Earth during the week. More than a dozen volcanoes globally have displayed more-or-less continuous eruptive activity for decades or longer, and such routine activity is typically not reported here. Moreover, Earth's sea-floor volcanism is seldom reported even though in theory it represents the single most prolific source of erupted material. The Weekly Volcanic Activity Report summarizes volcanic activity that meets one or more of the following criteria:
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